Question

a rectangle has the area equal to that of a square of side 80 cm is the breadth of the rectangle is 20 cm find its length

Answer 1

Area of rectangle=side of square
Area of square =side × side
= 80 ×80
= 6400cm²

Let the length be x
Area of rectangle= l ×b
6400 =20 × x
x= 6400\20
x=320
Length is 320cm

Answer 2

side of square=80 cm
breadth of rectangle=20cm
length of rectangle= ?

Area of square = side × side OR (side)^2
= 80 × 80 OR (80)^2
=6400 cm^2
Area of rectangle = length × breadth
= length × 20

it is given that, area of square=area of rectangle
=> 6400 = length × 20
=> 6400÷ 20 = length
=> 320 cm = length

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